:root {
  --bg: #f6f8fc;
  --bg-soft: #eef2f8;
  --panel: #ffffff;
  --line: #e5ecf4;
  --line-strong: #ccd7e5;
  --text: #172033;
  --text-soft: #526174;
  --muted: #8492a6;
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --primary-soft: #eaf1ff;
  --accent: #14b8a6;
  --danger: #dc2626;
  --green: #16a34a;
  --amber: #d97706;
  --radius-sm: 10px;
  --radius: 14px;
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.05);
  --shadow: 0 14px 40px rgba(15, 23, 42, 0.08);
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  min-height: 100vh;
  font-family: "Microsoft YaHei UI", "PingFang SC", "Segoe UI", system-ui, sans-serif;
  background:
    radial-gradient(900px 380px at 12% -10%, rgba(20, 184, 166, 0.14), transparent 58%),
    radial-gradient(900px 420px at 92% 0%, rgba(37, 99, 235, 0.13), transparent 56%),
    var(--bg);
  color: var(--text);
  line-height: 1.55;
}

a { color: inherit; text-decoration: none; }
h1, h2, h3, p { margin-top: 0; }
p { color: var(--text-soft); }

.topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  padding: 0;
  background: rgba(255, 255, 255, 0.92);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(12px) saturate(180%);
}

.topbar-inner {
  display: flex;
  align-items: center;
  gap: 44px;
  width: min(100%, 1200px);
  min-height: 72px;
  margin: 0 auto;
  padding: 0 32px;
}

.brand { display: inline-flex; align-items: center; gap: 12px; font-weight: 800; }
.brand-mark {
  width: 36px;
  height: 36px;
  display: block;
  border-radius: 10px;
  box-shadow: 0 8px 18px rgba(37, 99, 235, 0.28);
}
.brand-text { display: flex; flex-direction: column; line-height: 1.15; }
.brand-text small { color: var(--muted); font-size: 12px; font-weight: 500; }
.topnav {
  display: flex;
  flex: 1 1 auto;
  align-items: center;
  justify-content: flex-end;
  gap: 28px;
  min-width: 0;
}
.topnav-primary,
.topnav-actions {
  display: flex;
  align-items: center;
  gap: 6px;
  min-width: max-content;
}
.topnav-actions {
  padding-left: 0;
  border-left: 0;
}
.topnav a {
  padding: 7px 12px;
  border-radius: 6px;
  color: var(--text-soft);
  font-size: 14px;
  font-weight: 700;
}
.topnav a:hover, .topnav a.active { background: var(--primary-soft); color: var(--primary); }

.hero {
  position: relative;
  overflow: hidden;
  padding: 92px 28px 78px;
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(1000px 440px at 84% -120px, rgba(37, 99, 235, 0.18), transparent 60%),
    radial-gradient(760px 360px at 8% 0%, rgba(20, 184, 166, 0.14), transparent 58%),
    linear-gradient(180deg, #ffffff 0%, #f6f8fc 100%);
}

.hero-inner {
  max-width: 1100px;
  margin: 0 auto;
  text-align: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 15px;
  margin-bottom: 22px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #fff;
  color: var(--primary);
  font-size: 13px;
  font-weight: 800;
  box-shadow: var(--shadow-sm);
}

.hero h1 {
  margin: 0 0 18px;
  font-size: 52px;
  line-height: 1.14;
  letter-spacing: 0;
}

.hero h1 .accent {
  color: transparent;
  background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
  -webkit-background-clip: text;
  background-clip: text;
}

.hero h1 .brand-title {
  color: var(--text);
}

.hero .lead {
  max-width: 790px;
  margin: 0 auto 32px;
  color: var(--text-soft);
  font-size: 17px;
}

.hero-actions {
  display: inline-flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
}

.section {
  padding: 70px 28px;
}

.section.alt {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.72);
}

.section-inner {
  max-width: 1100px;
  margin: 0 auto;
}

.section-title {
  margin-bottom: 42px;
  text-align: center;
}

.section-title h2 {
  margin: 0 0 8px;
  font-size: 32px;
}

.section-title p {
  margin: 0;
  color: var(--text-soft);
}

.steps,
.features {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.step,
.feature {
  padding: 26px 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  box-shadow: var(--shadow-sm);
}

.step-num,
.feature-icon {
  width: 42px;
  height: 42px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 14px;
  border-radius: 12px;
  background: var(--primary-soft);
  color: var(--primary);
  font-weight: 900;
}

.feature-icon {
  background: linear-gradient(135deg, #eaf1ff 0%, #e5fbf7 100%);
}

.step h3,
.feature h3 {
  margin: 0 0 7px;
  font-size: 18px;
}

.step p,
.feature p {
  margin: 0;
  color: var(--text-soft);
  font-size: 14px;
}

.subjects {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
}

.subject-pill {
  padding: 9px 17px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--panel);
  color: var(--text-soft);
  font-size: 14px;
  font-weight: 700;
}

.subject-pill strong {
  margin-right: 6px;
  color: var(--primary);
}

.final-cta {
  padding: 54px 38px;
  border-radius: 20px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
  color: #fff;
  text-align: center;
  box-shadow: 0 26px 70px rgba(37, 99, 235, 0.20);
}

.final-cta h2 {
  margin: 0 0 10px;
  color: #fff;
  font-size: 30px;
}

.final-cta p {
  margin: 0 0 24px;
  color: rgba(255, 255, 255, 0.9);
}

.btn-on-cta {
  border-color: #fff;
  background: #fff;
  color: var(--primary);
}

.footer {
  padding: 28px;
  border-top: 1px solid var(--line);
  background: var(--panel);
  color: var(--muted);
  text-align: center;
  font-size: 13px;
}

.page { max-width: 1180px; margin: 0 auto; padding: 34px 28px; }
.page-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 24px;
}
.page-header h1 { margin: 0 0 8px; font-size: 32px; line-height: 1.18; letter-spacing: 0; }
.page-header p { margin-bottom: 0; }
.compact-header h1 { font-size: 24px; }
.eyebrow {
  margin: 0 0 8px;
  color: var(--primary);
  font-size: 13px;
  font-weight: 800;
}

.card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}
.card-pad { padding: 24px; }
.card-title-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}
.card-title-row h2 { margin: 0; font-size: 17px; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 0 20px;
  border: 1px solid transparent;
  border-radius: 999px;
  font: inherit;
  font-size: 14px;
  font-weight: 800;
  cursor: pointer;
}
.btn-primary { background: var(--primary); color: #fff; box-shadow: 0 10px 22px rgba(37, 99, 235, 0.24); }
.btn-primary:hover { background: var(--primary-dark); }
.btn-secondary { background: #fff; color: var(--text); border-color: var(--line-strong); }
.btn-secondary:hover { background: var(--bg-soft); }
.btn-danger { background: var(--danger); color: #fff; }
.btn-lg { min-height: 50px; padding: 0 28px; }
.btn-sm { min-height: 34px; padding: 0 14px; }
.btn:disabled { opacity: 0.55; cursor: not-allowed; box-shadow: none; }

.create-layout { display: grid; grid-template-columns: minmax(0, 1fr) 320px; gap: 22px; align-items: start; }
.create-form, .form-section, .right-rail, .job-layout { display: grid; gap: 20px; }
.section-label { display: flex; gap: 14px; align-items: center; }
.section-label > span {
  width: 30px;
  height: 30px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  background: var(--primary-soft);
  color: var(--primary);
  font-weight: 800;
}
.section-label strong { display: block; font-size: 15px; }
.section-label small { color: var(--muted); font-size: 13px; }

.source-advice {
  display: grid;
  gap: 4px;
  padding: 12px 14px;
  border: 1px solid #bfdbfe;
  border-radius: var(--radius-sm);
  background: #eff6ff;
  color: #1e3a8a;
  font-size: 13px;
}
.source-advice strong { font-size: 14px; }
.source-advice span { color: #35558a; line-height: 1.55; }

.source-grid { display: grid; grid-template-columns: 1.1fr 1fr; gap: 16px; }
.settings-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; }
.upload-panel {
  position: relative;
  min-height: 180px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 22px;
  border: 1.5px dashed #c4cfdd;
  border-radius: var(--radius);
  background: #fbfcff;
  text-align: center;
  cursor: pointer;
}
.upload-panel:hover, .upload-panel.drag-over { border-color: var(--primary); background: var(--primary-soft); }
.upload-panel.disabled { opacity: 0.55; cursor: not-allowed; }
.upload-panel input[type="file"] { position: absolute; inset: 0; width: 100%; height: 100%; opacity: 0; cursor: pointer; }
.upload-icon {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
  font-size: 22px;
  font-weight: 900;
}
.upload-preview {
  width: min(100%, 320px);
  max-height: 190px;
  object-fit: contain;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: #fff;
}
.upload-name {
  display: none;
  padding: 4px 12px;
  border-radius: 999px;
  background: var(--primary-soft);
  color: var(--primary);
  font-size: 13px;
  font-weight: 800;
}
.upload-panel.has-file .upload-name { display: inline-block; }

.field { display: flex; flex-direction: column; gap: 8px; font-size: 14px; }
.field > span { color: var(--text); font-weight: 800; }
.field input, .field select, .field textarea {
  width: 100%;
  min-height: 44px;
  padding: 10px 14px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  background: #fff;
  color: var(--text);
  font: inherit;
}
.field textarea {
  min-height: 132px;
  resize: vertical;
  line-height: 1.65;
}
.field input:disabled { background: #f1f5f9; color: var(--muted); }
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.14);
}
.field-hint, .muted { color: var(--muted); }

.clone-locked {
  display: grid;
  gap: 5px;
  padding: 12px 14px;
  border: 1px solid #fed7aa;
  border-radius: var(--radius-sm);
  background: #fff7ed;
  color: #9a3412;
  font-size: 13px;
}
.clone-locked strong { font-size: 14px; }
.clone-locked span { color: #9a5a1c; }

.voice-clone-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px;
  border: 1px solid #c7d2fe;
  border-radius: var(--radius);
  background: linear-gradient(180deg, #f8faff 0%, #ffffff 100%);
}
.voice-clone-main {
  min-width: 0;
  display: flex;
  align-items: center;
  gap: 14px;
}
.voice-clone-icon {
  width: 44px;
  height: 44px;
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
  font-weight: 900;
}
.voice-clone-main strong,
.voice-clone-main span,
.voice-clone-main small {
  display: block;
}
.voice-clone-main strong { font-size: 15px; }
.voice-clone-main span {
  margin-top: 3px;
  color: var(--text-soft);
  font-size: 13px;
}
.voice-clone-main small {
  margin-top: 5px;
  color: var(--muted);
  font-size: 12px;
}
.voice-clone-upload {
  position: relative;
  overflow: hidden;
  flex: 0 0 auto;
  min-height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 16px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  background: #fff;
  color: var(--primary);
  font-size: 14px;
  font-weight: 800;
  cursor: pointer;
}
.voice-clone-upload:hover {
  border-color: var(--primary);
  background: var(--primary-soft);
}
.voice-clone-upload input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.voice-trim-choice {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 12px 14px;
  border: 1px solid #fed7aa;
  border-radius: var(--radius-sm);
  background: #fff7ed;
  color: #9a3412;
  font-size: 13px;
}
.voice-trim-choice strong,
.voice-trim-choice span {
  display: block;
}
.voice-trim-choice strong { font-size: 14px; }
.voice-trim-choice span {
  margin-top: 3px;
  color: #9a5a1c;
}
.voice-trim-actions {
  display: flex;
  flex: 0 0 auto;
  justify-content: flex-end;
  gap: 8px;
}

.submit-bar { display: flex; align-items: center; gap: 16px; }
.form-message { margin: 0; color: var(--danger); font-size: 14px; }
.queue-notice {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--bg-soft);
  font-size: 13px;
}
.queue-notice span, .queue-summary { color: var(--text-soft); }
.queue-idle { border-color: #bbf7d0; background: #f0fdf4; color: #166534; }
.queue-busy { border-color: #fed7aa; background: #fff7ed; color: #9a3412; }

.tip-card h3 { margin: 0 0 10px; font-size: 15px; }
.tip-list { margin: 0; padding-left: 18px; color: var(--text-soft); font-size: 13px; line-height: 1.75; }
.queue-card-head { display: flex; justify-content: space-between; align-items: center; gap: 12px; margin-bottom: 10px; }

.recent-section { margin-top: 26px; }
.section-title-row { display: flex; justify-content: space-between; align-items: center; margin-bottom: 14px; }
.section-title-row h2 { margin: 0; font-size: 18px; }
.task-grid { display: grid; gap: 12px; }
.task-pagination {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-top: 18px;
  padding: 12px 0;
}
.task-pagination.hidden { display: none; }
.task-page-meta {
  color: var(--muted);
  font-size: 13px;
}
.task-page-controls {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.task-page-button {
  display: inline-grid;
  width: 36px;
  height: 36px;
  place-items: center;
  padding: 0;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  background: var(--panel);
  color: var(--text-soft);
  cursor: pointer;
  font: inherit;
  font-weight: 700;
}
.task-page-button:hover:not(:disabled),
.task-page-button.active {
  border-color: var(--primary);
  background: var(--primary);
  color: #fff;
}
.task-page-button:focus-visible {
  outline: 3px solid var(--primary-soft);
  outline-offset: 2px;
}
.task-page-button:disabled {
  cursor: not-allowed;
  opacity: 0.38;
}
.task-row {
  display: grid;
  grid-template-columns: 1fr 110px 90px minmax(160px, auto);
  align-items: center;
  gap: 16px;
  padding: 16px 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
}
.task-row:hover { border-color: var(--primary); box-shadow: var(--shadow); }
.task-id { display: flex; flex-direction: column; gap: 4px; min-width: 0; }
.task-id strong { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.task-id small { color: var(--muted); font-size: 12px; }
.task-actions,
.job-video-actions {
  display: inline-flex;
  justify-content: flex-end;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}
.publish-case-actions {
  justify-content: flex-start;
  margin: 0 0 12px;
}
.publish-case-actions .form-message {
  min-height: 0;
  margin: 0;
}
.video-upgrade-panel {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  margin: 0 0 12px;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: #f8fbff;
}
.video-upgrade-panel.hidden { display: none; }
.video-upgrade-copy {
  min-width: 0;
  display: grid;
  gap: 2px;
}
.video-upgrade-copy strong {
  font-size: 14px;
}
.video-upgrade-copy small,
.upgrade-status {
  color: var(--muted);
  font-size: 12px;
}
.upgrade-status {
  min-height: 18px;
  font-weight: 700;
}
.upgrade-status-queued,
.upgrade-status-running {
  color: var(--primary);
}
.upgrade-status-completed {
  color: var(--green);
}
.upgrade-status-failed {
  color: var(--danger);
}
.task-id code,
.job-id-chip,
.job-id-inline {
  width: fit-content;
  max-width: 100%;
  padding: 3px 8px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--bg-soft);
  color: var(--text-soft);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 12px;
  font-weight: 700;
  overflow-wrap: anywhere;
}
.job-id-chip { display: inline-flex; margin-top: 8px; }
.job-id-inline { flex: 0 1 auto; }
.empty-state {
  padding: 44px 20px;
  border: 1px dashed var(--line-strong);
  border-radius: var(--radius);
  background: var(--panel);
  color: var(--muted);
  text-align: center;
}

.status-pill, .status-dot {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  width: fit-content;
  min-height: 26px;
  padding: 0 12px;
  border-radius: 999px;
  background: #dbeafe;
  color: var(--primary);
  font-size: 13px;
  font-weight: 800;
}
.status-pill::before, .status-dot::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
}
.status-completed { background: #dcfce7; color: var(--green); }
.status-failed, .status-stopped { background: #fee2e2; color: var(--danger); }
.status-queued, .status-pending { background: #ffedd5; color: var(--amber); }
.status-running { background: #dbeafe; color: var(--primary); }

.status-summary { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; margin-bottom: 18px; }
.stage-text { color: var(--text-soft); font-size: 14px; }
.progress-overview { display: grid; gap: 10px; margin-bottom: 18px; }
.progress-track { height: 10px; overflow: hidden; border-radius: 999px; background: var(--bg-soft); }
.progress-bar { height: 100%; border-radius: inherit; background: linear-gradient(90deg, var(--primary), var(--accent)); transition: width 0.3s ease; }
.progress-meta { display: flex; justify-content: space-between; color: var(--muted); font-size: 13px; }
.user-step-list { display: grid; gap: 10px; }
.user-step {
  display: grid;
  grid-template-columns: 28px minmax(0, 1fr) auto;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: #fbfcfe;
}
.user-step-mark { width: 24px; height: 24px; border: 2px solid var(--line-strong); border-radius: 999px; background: #fff; }
.user-step small { display: block; color: var(--muted); font-size: 12px; }
.user-step em { color: var(--muted); font-style: normal; font-size: 13px; font-weight: 800; }
.user-step-running { border-color: #bfdbfe; background: #eff6ff; }
.user-step-running .user-step-mark { border-color: var(--primary); background: var(--primary); }
.user-step-completed { border-color: #bbf7d0; background: #f0fdf4; }
.user-step-completed .user-step-mark { border-color: var(--green); background: var(--green); }
.user-step-failed { border-color: #fecaca; background: #fef2f2; }
.user-step-failed .user-step-mark { border-color: var(--danger); background: var(--danger); }
.user-step-stopped { border-color: #fed7aa; background: #fff7ed; }
.user-step-stopped .user-step-mark { border-color: var(--amber); background: var(--amber); }
.soft-message { min-height: 20px; margin-top: 12px; color: var(--amber); }

.video-study-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  align-items: start;
  gap: 18px;
}
.job-video-shell {
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border-radius: var(--radius-sm);
  background: #050505;
}
.video-card video {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: contain;
  background: #050505;
}
.chapter-panel {
  min-width: 0;
  padding-left: 18px;
  border-left: 1px solid var(--line);
}
.chapter-panel-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 10px;
}
.solution-kicker {
  display: block;
  margin-bottom: 2px;
  color: var(--primary);
  font-size: 11px;
  font-weight: 800;
}
.chapter-panel h3 {
  margin: 0;
  font-size: 16px;
}
.chapter-progress {
  color: var(--muted);
  font-size: 12px;
  white-space: nowrap;
}
.chapter-list {
  max-height: 390px;
  overflow-y: auto;
  overscroll-behavior: contain;
  border-top: 1px solid var(--line);
}
.chapter-button {
  width: 100%;
  min-height: 58px;
  display: grid;
  grid-template-columns: 28px minmax(0, 1fr) auto;
  align-items: center;
  gap: 9px;
  padding: 9px 8px;
  border: 0;
  border-bottom: 1px solid var(--line);
  background: transparent;
  color: var(--text);
  text-align: left;
  cursor: pointer;
  font: inherit;
}
.chapter-button:hover { background: var(--bg-soft); }
.chapter-button.active { background: var(--primary-soft); color: var(--primary-dark); }
.chapter-number {
  width: 26px;
  height: 26px;
  display: inline-grid;
  place-items: center;
  border-radius: 50%;
  background: var(--bg-soft);
  color: var(--text-soft);
  font-size: 12px;
  font-weight: 800;
}
.chapter-button.active .chapter-number { background: var(--primary); color: #fff; }
.chapter-copy { min-width: 0; }
.chapter-copy strong,
.chapter-copy small { display: block; }
.chapter-copy strong {
  overflow: hidden;
  color: inherit;
  font-size: 13px;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.chapter-copy small {
  margin-top: 1px;
  overflow: hidden;
  color: var(--muted);
  font-size: 11px;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.chapter-time {
  color: var(--muted);
  font-variant-numeric: tabular-nums;
  font-size: 11px;
  font-weight: 700;
}

.solution-panel {
  padding: 10px 2px 28px;
  border-top: 1px solid var(--line-strong);
}
.solution-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 22px;
  padding: 14px 4px 18px;
}
.solution-header h2 { margin: 0 0 6px; font-size: 24px; }
.solution-header .eyebrow { margin-bottom: 5px; }
.solution-conclusion { max-width: 820px; margin: 0; }
.solution-answer {
  flex: 0 0 auto;
  min-width: 78px;
  padding: 10px 14px;
  border: 1px solid #99f6e4;
  border-radius: 6px;
  background: #ecfdf5;
  color: #047857;
  text-align: center;
  font-size: 16px;
  font-weight: 800;
}
.solution-overview {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.solution-overview-item {
  min-width: 0;
  padding: 16px 18px;
}
.solution-overview-item + .solution-overview-item { border-left: 1px solid var(--line); }
.solution-overview-item strong {
  display: block;
  margin-bottom: 5px;
  color: var(--muted);
  font-size: 12px;
}
.solution-overview-item p,
.solution-overview-item ul { margin: 0; color: var(--text-soft); font-size: 14px; }
.solution-overview-item ul { padding-left: 18px; }
.solution-strategy {
  margin: 22px 0 24px;
  padding: 16px 18px;
  border-left: 3px solid var(--accent);
  border-radius: 4px;
  background: #f0fdfa;
}
.solution-strategy h3 { margin: 0 0 9px; font-size: 16px; }
.solution-strategy ol {
  display: grid;
  gap: 5px;
  margin: 0;
  padding-left: 22px;
  color: var(--text-soft);
}
.solution-subhead {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 0 4px 8px;
  border-bottom: 1px solid var(--line-strong);
}
.solution-subhead h3 { margin: 0; font-size: 18px; }
.solution-subhead span { color: var(--muted); font-size: 12px; }
.solution-step-list { display: grid; }
.solution-step {
  display: grid;
  grid-template-columns: 38px minmax(0, 1fr);
  gap: 14px;
  padding: 20px 4px;
  border-bottom: 1px solid var(--line);
}
.solution-step-number {
  width: 32px;
  height: 32px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: #0f8b78;
  color: #fff;
  font-size: 14px;
  font-weight: 800;
}
.solution-step-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  margin-bottom: 7px;
}
.solution-step-head h4 { margin: 0; font-size: 16px; }
.solution-seek {
  flex: 0 0 auto;
  min-height: 30px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 0 9px;
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  background: #fff;
  color: var(--primary);
  cursor: pointer;
  font: inherit;
  font-size: 12px;
  font-weight: 800;
}
.solution-seek:hover { background: var(--primary-soft); }
.solution-play-icon {
  width: 0;
  height: 0;
  border-top: 4px solid transparent;
  border-bottom: 4px solid transparent;
  border-left: 7px solid currentColor;
}
.solution-step-goal { margin: 0 0 8px; color: var(--text-soft); font-size: 14px; }
.solution-detail-list {
  display: grid;
  gap: 4px;
  margin: 0;
  padding-left: 20px;
  color: var(--text-soft);
  font-size: 14px;
}
.solution-result,
.solution-step-pitfall {
  margin: 10px 0 0;
  padding: 8px 10px;
  border-left: 3px solid var(--accent);
  background: #f0fdfa;
  color: #155e55;
  font-size: 14px;
}
.solution-step-pitfall {
  border-left-color: #f59e0b;
  background: #fffbeb;
  color: #92400e;
}
.solution-notes {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin-top: 24px;
}
.solution-note {
  padding: 16px 18px;
  border-left: 3px solid var(--accent);
  border-radius: 4px;
  background: #f0fdfa;
}
.solution-note-pitfall { border-left-color: #f59e0b; background: #fffbeb; }
.solution-note h3 { margin: 0 0 8px; font-size: 15px; }
.solution-note ul { display: grid; gap: 5px; margin: 0; padding-left: 19px; color: var(--text-soft); font-size: 14px; }
.solution-panel .katex { font-size: 1.04em; }
.solution-panel .katex-display {
  max-width: 100%;
  margin: 8px 0;
  padding: 2px 0 5px;
  overflow-x: auto;
  overflow-y: hidden;
}
.solution-panel .katex-display > .katex { text-align: left; }
.solution-answer .katex { font-size: 1em; }
.case-toolbar {
  display: grid;
  grid-template-columns: minmax(260px, 520px) auto;
  align-items: end;
  gap: 16px;
  margin-bottom: 18px;
}
.case-search-field {
  max-width: 520px;
}
.case-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}
.case-card {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  box-shadow: var(--shadow-sm);
}
.case-card:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow);
}
.case-card video,
.case-media-shell {
  width: 100%;
  aspect-ratio: 16 / 9;
  display: block;
  background: #050505;
  position: relative;
  overflow: hidden;
}
.case-cover-image {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: contain;
  background: #fff;
}
.case-media-empty {
  display: grid;
  place-items: center;
}
.case-media-play {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  color: #fff;
  background:
    linear-gradient(180deg, rgba(15, 23, 42, 0.05), rgba(15, 23, 42, 0.34));
  cursor: pointer;
}
.case-media-empty .case-media-play {
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.04), rgba(0, 0, 0, 0.18)),
    #202124;
}
.case-media-play strong {
  padding: 5px 10px;
  border-radius: 999px;
  background: rgba(15, 23, 42, 0.58);
  font-size: 13px;
  font-weight: 700;
  backdrop-filter: blur(6px);
}
.case-play-icon {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.16);
  position: relative;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.24);
}
.case-play-icon::after {
  content: "";
  position: absolute;
  left: 19px;
  top: 14px;
  border-left: 16px solid #fff;
  border-top: 10px solid transparent;
  border-bottom: 10px solid transparent;
}
.case-card-body {
  display: grid;
  gap: 8px;
  padding: 13px 14px 15px;
}
.case-card-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 14px;
}
.case-card h2 {
  margin: 0;
  font-size: 15px;
  line-height: 1.35;
}
.case-card small {
  flex: 0 0 auto;
  color: var(--muted);
  font-size: 11px;
}
.case-card p {
  margin: 0;
  color: var(--text-soft);
  font-size: 13px;
  line-height: 1.55;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.log-output {
  min-height: 260px;
  max-height: 520px;
  overflow: auto;
  margin: 0;
  padding: 16px;
  border-radius: var(--radius-sm);
  background: #0f172a;
  color: #e2e8f0;
  white-space: pre-wrap;
  font-family: Consolas, ui-monospace, monospace;
  font-size: 13px;
  line-height: 1.6;
}
.mono { font-family: Consolas, ui-monospace, monospace; }
.hidden { display: none; }

.topnav-user {
  padding: 6px 10px;
  color: var(--text-soft);
  font-size: 13px;
  font-weight: 600;
}

.topnav-form {
  margin: 0;
}

.topnav-form button {
  min-height: 34px;
  padding: 0 10px;
  border: 0;
  border-radius: 999px;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font: inherit;
}

.topnav-form button:hover {
  background: var(--bg-soft);
  color: var(--text);
}

.topnav a.topnav-recharge {
  border: 0;
  background: #e6fffb;
  color: #0f766e;
  font-weight: 700;
}

.topnav a.topnav-recharge:hover {
  background: #ccfbf1;
  color: #115e59;
}

.auth-page {
  min-height: calc(100vh - 72px);
  display: grid;
  place-items: center;
  padding: 48px 20px;
}

.auth-card {
  width: min(460px, 100%);
}

.auth-card h1 {
  margin: 0 0 8px;
  font-size: 28px;
}

.auth-form {
  display: grid;
  gap: 16px;
  margin-top: 22px;
}

.auth-switch {
  margin: 18px 0 0;
  text-align: center;
}

.auth-switch a {
  color: var(--primary);
  font-weight: 700;
}

.branding-page {
  max-width: 1080px;
}

.branding-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(300px, 0.65fr);
  gap: 24px;
  align-items: start;
}

.branding-form {
  display: grid;
  gap: 20px;
}

.slug-input-row {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: center;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: #fff;
}

.slug-input-row > span {
  align-self: stretch;
  display: grid;
  place-items: center;
  padding: 0 12px;
  border-right: 1px solid var(--line);
  background: var(--bg-soft);
  color: var(--muted);
  font-family: Consolas, ui-monospace, monospace;
}

.slug-input-row input {
  width: 100%;
  border: 0;
  border-radius: 0;
  outline: none;
}

.slug-input-row:focus-within {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-soft);
}

.check-field {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text-soft);
  font-size: 14px;
  cursor: pointer;
}

.check-field input {
  width: 18px;
  height: 18px;
  margin: 0;
  accent-color: var(--primary);
}

.branding-enable {
  padding-top: 16px;
  border-top: 1px solid var(--line);
  color: var(--text);
  font-weight: 700;
}

.branding-preview-panel {
  position: sticky;
  top: 88px;
}

.admin-branding-layout {
  margin-top: 22px;
}

.admin-branding-preview {
  padding-left: 24px;
  border-left: 1px solid var(--line);
}

.preview-label {
  display: block;
  margin-bottom: 18px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

.branding-preview {
  display: grid;
  justify-items: center;
  min-height: 190px;
  padding: 16px;
  text-align: center;
}

.branding-preview img {
  width: 72px;
  height: 72px;
  object-fit: contain;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.branding-preview strong {
  max-width: 100%;
  margin-top: 14px;
  overflow-wrap: anywhere;
  font-size: 22px;
}

.branding-preview p {
  margin: 5px 0 0;
  overflow-wrap: anywhere;
}

.public-url-field {
  margin: 8px 0 16px;
}

.public-url-field input {
  font-family: Consolas, ui-monospace, monospace;
  font-size: 13px;
}

.success-message,
.branding-error {
  margin-bottom: 18px;
  padding: 11px 14px;
  border: 1px solid;
  border-radius: var(--radius-sm);
}

.success-message {
  border-color: #bbf7d0;
  background: #f0fdf4;
  color: #15803d;
}

.branding-error {
  border-color: #fecaca;
  background: #fef2f2;
}

.brand-disabled-note {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
}

.field-label-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.domain-setup {
  margin-top: 20px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.domain-setup > strong {
  display: block;
  margin-bottom: 5px;
}

.domain-setup p {
  margin-bottom: 12px;
  font-size: 13px;
}

.domain-setup .domain-provider-tip {
  padding: 10px 12px;
  border: 1px solid #fde68a;
  border-radius: var(--radius-sm);
  background: #fffbeb;
  color: #92400e;
}

.domain-setup dl {
  display: grid;
  grid-template-columns: 72px minmax(0, 1fr);
  gap: 8px 10px;
  margin: 0 0 16px;
  font-size: 13px;
}

.domain-setup dt {
  color: var(--muted);
}

.domain-setup dd {
  min-width: 0;
  margin: 0;
}

.domain-setup code {
  display: inline-block;
  max-width: 100%;
  overflow-wrap: anywhere;
  color: var(--text);
}

.domain-verified-note {
  color: var(--green);
}

.secondary-public-url {
  margin-top: -6px;
}

.branding-danger-zone {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  margin-top: 28px;
  padding-top: 22px;
  border-top: 1px solid #fecaca;
}

.branding-danger-zone strong {
  color: var(--danger);
}

.branding-danger-zone p {
  margin: 4px 0 0;
  font-size: 13px;
}

.white-label-editor {
  margin-top: 22px;
}

.white-label-access-mode {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  min-width: 0;
  margin: 0;
  padding: 0;
  border: 0;
}

.white-label-access-mode legend {
  grid-column: 1 / -1;
  margin-bottom: 2px;
  color: var(--text);
  font-size: 14px;
  font-weight: 800;
}

.white-label-credit-policy {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
}

.white-label-credit-policy legend {
  padding: 0 4px;
  color: var(--text);
  font-size: 14px;
  font-weight: 800;
}

.white-label-admin-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(300px, 0.72fr);
  gap: 18px;
  align-items: start;
}

.white-label-admin-list {
  display: grid;
  gap: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
}

.white-label-admin-list > div {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 16px;
  padding: 12px 14px;
  border-top: 1px solid var(--line);
}

.white-label-admin-list.white-label-user-list > div {
  grid-template-columns: minmax(120px, 0.8fr) minmax(150px, 1fr) minmax(170px, 1.2fr) minmax(150px, auto);
}

.white-label-admin-list.white-label-task-list > div {
  grid-template-columns: minmax(130px, 0.8fr) minmax(220px, 1.25fr) minmax(90px, 0.35fr);
  align-items: center;
}

.white-label-user-list .admin-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.white-label-user-list .admin-actions form { margin: 0; }

.account-binding-card { max-width: 720px; }

.account-binding-summary {
  display: grid;
  gap: 4px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--bg-soft);
}

.account-binding-summary span,
.account-binding-summary small { color: var(--muted); }

.white-label-admin-list > div:first-child { border-top: 0; }
.white-label-admin-list .list-heading { color: var(--muted); font-size: 13px; background: var(--bg-soft); font-weight: 700; }
.white-label-admin-list code { overflow-wrap: anywhere; }

.white-label-admin-empty {
  margin: 0;
  padding: 18px;
  color: var(--muted);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
}

.white-label-access-option {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
  padding: 12px 14px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  cursor: pointer;
}

.white-label-access-option:has(input:checked) {
  border-color: var(--primary);
  background: var(--primary-soft);
}

.white-label-access-option input {
  flex: 0 0 auto;
  accent-color: var(--primary);
}

.white-label-access-option strong,
.white-label-access-option small {
  display: block;
}

.white-label-access-option small {
  margin-top: 2px;
  color: var(--muted);
  font-size: 12px;
}

.white-label-table {
  display: grid;
  gap: 10px;
  margin-top: 20px;
}

.white-label-row {
  display: grid;
  grid-template-columns: minmax(240px, 1.5fr) minmax(220px, 1fr) auto auto;
  gap: 18px;
  align-items: center;
  padding: 14px 0;
  border-top: 1px solid var(--line);
}

.white-label-identity {
  display: flex;
  min-width: 0;
  align-items: center;
  gap: 12px;
}

.white-label-identity img {
  width: 40px;
  height: 40px;
  flex: 0 0 auto;
  object-fit: contain;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.white-label-row strong,
.white-label-row small {
  display: block;
  overflow-wrap: anywhere;
}

.white-label-row small {
  margin-top: 3px;
  color: var(--muted);
  font-size: 12px;
}

.white-label-row code {
  overflow-wrap: anywhere;
}

.task-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 18px;
}

.filter-chip {
  min-height: 36px;
  padding: 0 16px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  background: #fff;
  color: var(--text-soft);
  font: inherit;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
}

.filter-chip:hover,
.filter-chip.active {
  border-color: var(--primary);
  background: var(--primary-soft);
  color: var(--primary);
}

.admin-body {
  background: #f3f6fb;
}

.admin-shell {
  display: grid;
  grid-template-columns: 248px minmax(0, 1fr);
  min-height: 100vh;
}

.admin-sidebar {
  position: sticky;
  top: 0;
  height: 100vh;
  padding: 22px 18px;
  background: #0f172a;
  color: #e5e7eb;
}

.admin-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 28px;
}

.admin-brand strong,
.admin-brand small {
  display: block;
}

.admin-brand small {
  margin-top: 2px;
  color: #94a3b8;
  font-size: 12px;
}

.admin-menu {
  display: grid;
  gap: 8px;
}

.admin-menu a {
  padding: 12px 14px;
  border-radius: var(--radius-sm);
  color: #cbd5e1;
  font-weight: 600;
}

.admin-menu a:hover,
.admin-menu a.active {
  background: rgba(255, 255, 255, 0.10);
  color: #fff;
}

.admin-main {
  min-width: 0;
  max-width: 1280px;
  width: 100%;
  padding: 32px;
}

.admin-header {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  align-items: center;
  margin-bottom: 24px;
}

.admin-header-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 10px;
}

.white-label-admin-main {
  max-width: 1280px;
}

.white-label-stats {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.white-label-policy-form {
  max-width: 680px;
}

.white-label-watermark-form {
  max-width: 900px;
}

.admin-header h1 {
  margin: 0 0 8px;
  font-size: 30px;
}

.admin-stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  margin-bottom: 18px;
}

.admin-stat {
  padding: 20px;
}

.admin-stat span {
  display: block;
  margin-bottom: 8px;
  color: var(--muted);
  font-size: 13px;
}

.admin-stat strong {
  font-size: 30px;
  line-height: 1;
}

.admin-stat strong.admin-stat-text {
  font-size: 22px;
}

.admin-stat small {
  display: block;
  margin-top: 9px;
  overflow-wrap: anywhere;
  color: var(--text-soft);
  font-size: 12px;
  line-height: 1.4;
}

.admin-summary-list,
.admin-user-list,
.admin-table {
  display: grid;
  gap: 10px;
}

.admin-user-toolbar {
  display: grid;
  grid-template-columns: minmax(280px, 1fr) auto auto;
  gap: 10px;
  align-items: end;
  margin-bottom: 18px;
}

.admin-user-toolbar .field {
  margin: 0;
}

.admin-user-search-summary {
  grid-column: 1 / -1;
  color: var(--muted);
}

.admin-summary-list div {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: #fbfcfe;
}

.admin-summary-list span {
  color: var(--muted);
}

.admin-user-row {
  display: grid;
  grid-template-columns: minmax(220px, 1fr) 100px 150px minmax(340px, auto) minmax(120px, auto);
  gap: 14px;
  align-items: center;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: #fbfcfe;
}

.admin-job-row {
  display: grid;
  grid-template-columns: minmax(280px, 1.15fr) minmax(220px, 1fr) 110px minmax(260px, auto);
  gap: 14px;
  align-items: center;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: #fbfcfe;
}

.admin-case-row {
  display: grid;
  grid-template-columns: minmax(260px, 1fr) minmax(150px, auto) minmax(170px, auto);
  gap: 14px;
  align-items: center;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: #fbfcfe;
}

.admin-case-main {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
}

.admin-case-main strong,
.admin-case-main small {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.admin-case-main small {
  color: var(--muted);
  font-size: 12px;
}

.case-upload-form {
  display: grid;
  gap: 14px;
  margin-bottom: 18px;
}

.admin-job-main,
.admin-job-owner {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
}

.admin-job-main strong,
.admin-job-owner {
  overflow: hidden;
  text-overflow: ellipsis;
}

.admin-job-main small,
.admin-job-main code {
  color: var(--muted);
  font-size: 12px;
}

.admin-job-main code {
  width: max-content;
  max-width: 100%;
  padding: 2px 6px;
  border-radius: 6px;
  background: #eef3fb;
  color: #40506a;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  user-select: text;
}

.admin-model-stage {
  display: grid;
  gap: 14px;
  padding: 16px 0;
  border-top: 1px solid var(--line);
}

.admin-model-stage:first-child {
  border-top: 0;
  padding-top: 0;
}

.admin-model-stage-title {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
}

.admin-model-stage-title strong {
  font-size: 16px;
}

.admin-model-stage-title small {
  color: var(--muted);
}

.admin-model-fields {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.admin-form {
  display: grid;
  gap: 18px;
}

.render-mode-segment {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  overflow: hidden;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  background: #fff;
}

.render-mode-option {
  position: relative;
  min-width: 0;
  cursor: pointer;
}

.render-mode-option + .render-mode-option {
  border-left: 1px solid var(--line-strong);
}

.render-mode-option input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.render-mode-copy {
  display: grid;
  min-height: 88px;
  align-content: center;
  gap: 5px;
  padding: 16px 18px;
  color: var(--text-soft);
  transition: background 0.15s, color 0.15s;
}

.render-mode-copy strong,
.render-mode-copy small {
  display: block;
}

.render-mode-copy small {
  color: var(--muted);
  font-size: 12px;
}

.render-mode-option:hover .render-mode-copy,
.render-mode-option input:focus-visible + .render-mode-copy {
  background: #f8fafc;
}

.render-mode-option input:checked + .render-mode-copy {
  background: var(--primary-soft);
  color: var(--primary);
}

.render-mode-option input:checked + .render-mode-copy small {
  color: var(--primary);
}

.render-routing-fields {
  max-width: 760px;
}

.watermark-settings {
  display: grid;
  grid-template-columns: minmax(260px, 0.8fr) minmax(300px, 1.2fr);
  gap: 18px;
  align-items: end;
  max-width: 900px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.watermark-settings .billing-toggle {
  min-height: 44px;
  margin: 0;
}

.render-concurrency-status {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.admin-user-row strong,
.admin-user-row small {
  display: block;
}

.admin-user-row small {
  margin-top: 4px;
  color: var(--muted);
}

.admin-user-row .user-registration-source {
  display: inline-flex;
  width: fit-content;
  padding: 3px 8px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 700;
}

.source-main {
  background: #eef2f7;
  color: #526174 !important;
}

.source-white-label {
  background: #ecfdf5;
  color: #047857 !important;
}

.admin-user-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 8px;
}

.admin-user-credit-editor {
  display: flex;
  align-items: end;
  flex-wrap: wrap;
  gap: 8px;
}

.admin-user-credit-field {
  display: grid;
  gap: 4px;
}

.admin-user-credit-field span {
  color: var(--muted);
  font-size: 12px;
}

.admin-user-credit-field input {
  width: 130px;
  min-height: 38px;
  padding: 8px 10px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
}

.admin-user-daily-free {
  display: inline-flex;
  min-height: 38px;
  align-items: center;
  gap: 7px;
  padding: 8px 10px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
  font-size: 13px;
  font-weight: 700;
  white-space: nowrap;
}

.admin-user-daily-free input {
  width: 16px;
  height: 16px;
  margin: 0;
  accent-color: var(--primary);
}

.admin-user-daily-free:has(input:not(:checked)) {
  color: #b42318;
  border-color: #fecaca;
  background: #fff7f7;
}

.admin-user-daily-free:has(input:disabled) {
  opacity: 0.55;
}

.admin-user-row select {
  min-height: 38px;
  padding: 8px 10px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
}

.invite-form {
  display: grid;
  grid-template-columns: minmax(220px, 1fr) auto minmax(160px, auto);
  gap: 12px;
  align-items: end;
  margin-bottom: 18px;
}

.admin-invite-row {
  display: grid;
  grid-template-columns: minmax(150px, 0.7fr) minmax(220px, 1fr) 100px minmax(190px, auto);
  gap: 14px;
  align-items: center;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: #fbfcfe;
}

.billing-settings-form {
  margin-bottom: 20px;
}

.billing-toggle {
  display: flex;
  align-items: center;
  gap: 12px;
  width: fit-content;
  cursor: pointer;
}

.billing-toggle input {
  width: 20px;
  height: 20px;
  accent-color: var(--primary);
}

.billing-toggle strong,
.billing-toggle small {
  display: block;
}

.billing-toggle small {
  margin-top: 3px;
  color: var(--muted);
}

.billing-divider {
  height: 1px;
  margin: 22px 0;
  background: var(--line);
}

.credit-code-form {
  display: grid;
  grid-template-columns: minmax(160px, 0.7fr) minmax(130px, 0.5fr) minmax(220px, 1fr) auto;
  gap: 12px;
  align-items: end;
  margin-bottom: 18px;
}

.credit-code-form .form-message {
  grid-column: 1 / -1;
}

.admin-credit-code-row {
  display: grid;
  grid-template-columns: minmax(180px, 0.8fr) minmax(180px, 0.8fr) minmax(190px, 1fr) minmax(160px, auto);
  gap: 14px;
  align-items: center;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: #fbfcfe;
}

.admin-credit-code-row strong,
.admin-credit-code-row small {
  display: block;
}

.admin-credit-code-row small {
  margin-top: 4px;
  color: var(--muted);
}

.credit-balance-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  margin: 18px 0 8px;
}

.credit-balance-row span,
.credit-meta {
  color: var(--muted);
  font-size: 13px;
}

.credit-balance-row strong {
  font-size: 28px;
  color: var(--text);
}

.credit-meta {
  line-height: 1.6;
}

.credit-redeem-form {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 8px;
  margin-top: 16px;
}

.credit-redeem-form input {
  min-width: 0;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
}

.credit-center-link {
  display: inline-flex;
  margin-top: 14px;
  color: var(--primary);
  font-size: 13px;
  font-weight: 700;
}

.personal-center-grid {
  display: grid;
  grid-template-columns: minmax(280px, 0.72fr) minmax(360px, 1.28fr);
  gap: 18px;
  align-items: start;
}

.personal-profile-list {
  display: grid;
  gap: 0;
  margin: 0;
}

.personal-profile-list > div {
  display: grid;
  grid-template-columns: 92px minmax(0, 1fr);
  gap: 12px;
  padding: 12px 0;
  border-top: 1px solid var(--line);
}

.personal-profile-list dt { color: var(--muted); }
.personal-profile-list dd { margin: 0; overflow-wrap: anywhere; font-weight: 700; }
.personal-logout-form { margin-top: 18px; }
.personal-credit-card { min-height: 100%; grid-column: 2; grid-row: 1; }
.personal-binding-card { grid-column: 1 / -1; max-width: none; }

.personal-recharge-card,
.personal-recharge-orders {
  grid-column: 1 / -1;
}

.personal-recharge-card {
  scroll-margin-top: 96px;
}

.personal-recharge-card:target {
  border-color: #5eead4;
  box-shadow: 0 0 0 3px rgba(20, 184, 166, 0.12), var(--shadow);
}

.credit-card-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.recharge-form,
.recharge-fieldset {
  display: grid;
  gap: 16px;
}

.recharge-fieldset {
  margin: 0;
  padding: 0;
  border: 0;
}

.recharge-fieldset legend {
  margin-bottom: 10px;
  font-weight: 800;
}

.recharge-package-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.recharge-package-option {
  display: flex;
  gap: 10px;
  align-items: center;
  min-height: 108px;
  padding: 16px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  cursor: pointer;
}

.recharge-package-option:has(input:checked) {
  border-color: var(--primary);
  background: var(--primary-soft);
}

.recharge-package-option input,
.recharge-methods input {
  accent-color: var(--primary);
}

.recharge-package-option span,
.recharge-package-option small,
.recharge-package-option strong,
.recharge-package-option em {
  display: block;
}

.recharge-package-option small,
.recharge-package-option em {
  color: var(--muted);
  font-style: normal;
}

.recharge-package-option strong {
  margin: 3px 0;
  font-size: 24px;
}

.recharge-methods,
.payment-method-toggles {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.recharge-methods label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  cursor: pointer;
}

.recharge-order-list > div,
.admin-recharge-order-row {
  display: grid;
  grid-template-columns: minmax(150px, 0.75fr) minmax(160px, 0.75fr) minmax(100px, 0.35fr) minmax(190px, 0.8fr) minmax(220px, 1fr);
  gap: 14px;
  align-items: center;
  padding: 14px 16px;
  border-top: 1px solid var(--line);
}

.recharge-order-list .list-heading {
  border-top: 0;
  background: var(--bg-soft);
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

.recharge-order-list code,
.admin-recharge-order-row code {
  overflow-wrap: anywhere;
}

.payment-settings-form,
.recharge-package-form {
  display: grid;
  gap: 16px;
}

.recharge-package-form {
  grid-template-columns: minmax(180px, 1fr) minmax(130px, 0.55fr) minmax(130px, 0.55fr) minmax(100px, 0.4fr) auto;
  align-items: end;
  margin-bottom: 18px;
}

.recharge-package-form .form-message {
  grid-column: 1 / -1;
}

.admin-recharge-package-row {
  display: grid;
  grid-template-columns: minmax(160px, 1fr) minmax(120px, 0.6fr) minmax(120px, 0.6fr) minmax(90px, 0.4fr) auto auto;
  gap: 12px;
  align-items: end;
  padding: 14px;
  border-top: 1px solid var(--line);
}

.admin-recharge-package-row .compact-check {
  min-height: 42px;
}

.admin-recharge-order-row strong,
.admin-recharge-order-row small {
  display: block;
}

.recharge-order-time strong,
.recharge-order-time small {
  display: block;
  white-space: nowrap;
}

.recharge-order-time strong {
  font-size: 13px;
}

.recharge-order-time small {
  margin-top: 4px;
  color: var(--muted);
  font-size: 12px;
}

.admin-recharge-order-row small {
  margin-top: 4px;
  color: var(--muted);
}

.admin-invite-row strong,
.admin-invite-row small {
  display: block;
}

.admin-invite-row small {
  margin-top: 4px;
  color: var(--muted);
}

.invite-code {
  padding: 8px 10px;
  border-radius: var(--radius-sm);
  background: #f8fafc;
  border: 1px solid var(--line);
  font-family: Consolas, ui-monospace, monospace;
  font-weight: 700;
  letter-spacing: 0.5px;
}

.admin-actions {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  flex-wrap: wrap;
}

/* Tutor-facing product skin: keep the current APIs and task UI, match the public brand. */
:root {
  --line: #e6ecf3;
  --line-strong: #d4dde7;
  --text: #1a2233;
  --text-soft: #475569;
  --muted: #8595a8;
  --primary: #4f46e5;
  --primary-dark: #4338ca;
  --primary-soft: #eef0ff;
  --blue: #2563eb;
  --radius-lg: 20px;
  --shadow: 0 8px 28px rgba(15, 23, 42, 0.06);
  --shadow-lg: 0 24px 60px rgba(15, 23, 42, 0.10);
}

body {
  font-family: "PingFang SC", "Microsoft YaHei UI", "Segoe UI", system-ui, -apple-system, Arial, sans-serif;
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

.brand {
  color: var(--text);
  font-weight: 700;
}

.brand-mark {
  flex: 0 0 auto;
  object-fit: contain;
  background: #fff;
  box-shadow: 0 6px 16px rgba(99, 102, 241, 0.35);
}

.brand-text strong {
  max-width: 240px;
  overflow-wrap: anywhere;
  font-size: 17px;
  letter-spacing: 0.5px;
}

.brand-text small {
  font-weight: 400;
}

.topnav {
  align-items: center;
  gap: 28px;
}

.topnav a {
  font-weight: 500;
  transition: background 0.15s, color 0.15s;
}

.topnav a:hover {
  background: var(--bg-soft);
  color: var(--text);
}

.topnav a.active {
  background: var(--primary-soft);
  color: var(--primary);
}

.topnav-cta {
  margin-left: 8px;
  background: var(--primary);
  color: #fff !important;
  font-weight: 600 !important;
  box-shadow: 0 6px 16px rgba(79, 70, 229, 0.30);
}

.topnav-cta:hover {
  background: var(--primary-dark) !important;
  color: #fff !important;
}

.hero {
  padding: 96px 32px 80px;
  background:
    radial-gradient(1200px 500px at 80% -100px, rgba(99, 102, 241, 0.18), transparent 60%),
    radial-gradient(900px 400px at 0% 0%, rgba(20, 184, 166, 0.15), transparent 60%),
    linear-gradient(180deg, #ffffff 0%, var(--bg) 100%);
}

.hero-badge {
  padding: 6px 14px;
  font-weight: 600;
}

.hero h1 {
  line-height: 1.15;
  letter-spacing: -1.5px;
  font-weight: 800;
}

.hero h1 .accent,
.upload-icon {
  background: linear-gradient(135deg, #6366f1 0%, #14b8a6 100%);
  -webkit-background-clip: text;
  background-clip: text;
}

.upload-icon {
  color: #fff;
  -webkit-background-clip: border-box;
  background-clip: border-box;
}

.hero .lead {
  max-width: 720px;
}

.section {
  padding: 72px 32px;
}

.section.alt {
  background: var(--panel);
}

.step,
.feature {
  border-radius: var(--radius-lg);
}

.feature {
  transition: transform 0.2s, box-shadow 0.2s;
}

.feature:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.final-cta {
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, #4f46e5 0%, #14b8a6 100%);
  box-shadow: var(--shadow-lg);
}

.page {
  max-width: 1200px;
  padding: 32px;
}

.page-header h1 {
  margin-bottom: 4px;
  font-size: 26px;
  letter-spacing: -0.5px;
}

.settings-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.btn {
  font-weight: 600;
  transition: background 0.15s, color 0.15s, transform 0.05s, box-shadow 0.15s;
}

.btn-primary {
  background: var(--primary);
  box-shadow: 0 8px 22px rgba(79, 70, 229, 0.30);
}

.btn-primary:hover {
  background: var(--primary-dark);
}

.field input:focus,
.field select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.15);
}

@media (max-width: 980px) {
  .topbar-inner { gap: 28px; }
  .brand-text small { display: none; }
  .topnav { gap: 18px; }
  .topnav a { padding: 7px 10px; font-size: 13px; }
  .branding-layout {
    grid-template-columns: 1fr;
  }

  .branding-preview-panel {
    position: static;
  }
  .admin-branding-preview {
    padding: 24px 0 0;
    border-top: 1px solid var(--line);
    border-left: 0;
  }
  .create-layout { grid-template-columns: 1fr; }
  .settings-grid { grid-template-columns: 1fr; }
  .case-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .case-toolbar { grid-template-columns: 1fr; }
  .video-study-layout { grid-template-columns: 1fr; }
  .chapter-panel {
    padding: 16px 0 0;
    border-top: 1px solid var(--line);
    border-left: 0;
  }
  .chapter-list { max-height: 280px; }
  .steps, .features { grid-template-columns: 1fr; }
  .admin-shell { grid-template-columns: 1fr; }
  .admin-sidebar { position: static; height: auto; }
  .admin-stats, .admin-model-fields, .render-mode-segment, .render-concurrency-status, .watermark-settings { grid-template-columns: 1fr; }
  .white-label-stats { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .render-mode-option + .render-mode-option { border-left: 0; border-top: 1px solid var(--line-strong); }
  .admin-job-row, .admin-user-row, .admin-invite-row, .admin-credit-code-row, .admin-case-row, .invite-form, .credit-code-form, .admin-user-toolbar { grid-template-columns: 1fr; }
  .white-label-row { grid-template-columns: 1fr; align-items: start; }
  .white-label-admin-grid { grid-template-columns: 1fr; }
  .personal-center-grid { grid-template-columns: 1fr; }
  .personal-credit-card { grid-column: auto; grid-row: auto; }
  .recharge-package-grid { grid-template-columns: 1fr; }
  .recharge-package-form, .admin-recharge-package-row, .recharge-order-list > div, .admin-recharge-order-row { grid-template-columns: 1fr; }
  .personal-binding-card { grid-column: auto; }
  .white-label-admin-list.white-label-user-list > div { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
  .hero { padding: 58px 18px 52px; }
  .admin-header-actions { justify-content: stretch; }
  .admin-header-actions .btn { flex: 1 1 auto; }
  .white-label-stats { grid-template-columns: 1fr; }
  .white-label-admin-list > div { grid-template-columns: 1fr; gap: 5px; }
  .hero h1 { font-size: 34px; }
  .section { padding: 54px 18px; }
  .solution-header { align-items: stretch; }
  .solution-header h2 { font-size: 21px; }
  .solution-answer { min-width: 70px; padding: 8px 10px; font-size: 14px; }
  .solution-overview { grid-template-columns: 1fr; }
  .solution-overview-item + .solution-overview-item {
    border-top: 1px solid var(--line);
    border-left: 0;
  }
  .solution-step { grid-template-columns: 32px minmax(0, 1fr); gap: 10px; }
  .solution-step-number { width: 28px; height: 28px; font-size: 12px; }
  .solution-step-head { align-items: flex-start; flex-direction: column; gap: 8px; }
  .solution-notes { grid-template-columns: 1fr; }
  .topbar {
    padding: 0;
  }
  .topbar-inner {
    flex-direction: column;
    align-items: stretch;
    gap: 9px;
    min-height: 0;
    padding: 11px 18px 8px;
  }
  .brand { min-width: 0; }
  .brand-text small { display: none; }
  .topnav {
    width: 100%;
    min-width: 0;
    max-width: 100%;
    padding-bottom: 3px;
    overflow-x: auto;
    overscroll-behavior-inline: contain;
    scrollbar-width: thin;
    justify-content: flex-start;
    gap: 6px;
  }
  .topnav-primary,
  .topnav-actions { flex: 0 0 auto; }
  .topnav-actions {
    padding-left: 0;
    border-left: 0;
  }
  .topnav a,
  .topnav-user,
  .topnav-form {
    flex: 0 0 auto;
    white-space: nowrap;
  }
  .topnav a { padding: 6px 10px; font-size: 13px; }
  .topnav-cta { margin-left: 0; }
  .branding-danger-zone {
    align-items: stretch;
    flex-direction: column;
  }
  .branding-danger-zone .btn {
    width: 100%;
  }
  .white-label-list-header {
    align-items: stretch;
    flex-direction: column;
  }
  .white-label-list-header .btn {
    width: 100%;
  }
  .white-label-access-mode {
    grid-template-columns: 1fr;
  }
  .page { padding: 24px 18px; }
  .page-header { flex-direction: column; align-items: stretch; }
  .page-header h1 { font-size: 26px; }
  .source-grid, .task-row { grid-template-columns: 1fr; }
  .task-actions, .job-video-actions { justify-content: flex-start; }
  .task-pagination { align-items: flex-start; flex-direction: column; }
  .task-page-controls { max-width: 100%; flex-wrap: wrap; }
  .case-grid { grid-template-columns: 1fr; }
  .voice-clone-card,
  .video-upgrade-panel,
  .voice-trim-choice {
    flex-direction: column;
    align-items: stretch;
  }
  .voice-clone-upload,
  .voice-trim-actions {
    width: 100%;
  }
  .voice-trim-actions .btn {
    flex: 1;
  }
  .submit-bar, .progress-meta { flex-direction: column; align-items: stretch; }
  .user-step { grid-template-columns: 24px minmax(0, 1fr); }
  .user-step em { grid-column: 2; }
}